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GPT-4o mini

OpenAI · GPT Terra line · lightweight

Released July 18, 2024Replaced by o1-mini

GPT-4o mini was released by OpenAI on July 18, 2024, as a lightweight model in the GPT Terra line.

  • Release 2 of 9 in the GPT Terra line.
  • Came 505 days after GPT-3.5 Turbo, released Mar 1, 2023.
  • Replaced by o1-mini on September 12, 2024, 56 days later.
  • These days the line ships a new model about every 114 days.

What changed

A small GPT-4o model for developers at $0.15 / $0.60 per 1M tokens, with a 128,000-token context window.

Sources: OpenAI

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Where the GPT Terra line stands

GPT-5.6 Terra is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

GPT Terra

OpenAI · lightweight line

Latest: GPT-5.6 Terra · Jul 9, 2026

Due107 days since the last release · usual gap 114 days

The mid tier of the GPT-5.6 trio (Sol / Terra / Luna), positioned by OpenAI as the balanced everyday model: $2 per million input tokens and $12 per million output tokens after the 30 July price cut.

What changed in GPT-5.6 Terra →
Days since last release
107
days
Usual gap
114
days
Recent gaps
GPT-5.6 Terra · Jul 2026
114
GPT-5.4 mini · Mar 2026
222
GPT-5 mini · Aug 2025
113
o4-mini · Apr 2025
75

Every GPT Terra release

Newest first. See the full line with every card →

  1. Jul 9, 2026GPT-5.6 Terra
  2. Mar 17, 2026GPT-5.4 mini
  3. Aug 7, 2025GPT-5 mini
  4. Apr 16, 2025o4-mini
  5. Apr 14, 2025GPT-4.1 mini
  6. Jan 31, 2025o3-mini
  7. Sep 12, 2024o1-mini
  8. Jul 18, 2024GPT-4o mini · this page
  9. Mar 1, 2023GPT-3.5 Turbo